// 函数组合 调试
// NEVER SAY DIE  --> never-say-die

const _ = require('lodash');

// const log = v => {
//   console.log(v)
//   return v
// }

const trace = _.curry((tag, v) => {
  console.log(tag, v);
  return v;
});

// _.split()
const split = _.curry((sep, str) => _.split(str, sep));

// _.toLower()
const join = _.curry((sep, array) => _.join(array, sep));

const map = _.curry((fn, array) => _.map(array, fn));

const f = _.flowRight(
  join('-'),
  trace('map 之后'),
  map(_.toLower),
  trace('split 之后'),
  split(' ')
);

console.log(f('NEVER SAY DIE'));
